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4.4 Zero Adjust
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NOTE
･ To make a zero adjustment of the 9453, turn off SENSE CHECK.
Following the adjustment, SENSE CHECK may be turned on.
･ The zero-adjust can be used for up to 2400 counts in measuring
resistance (240 counts for FAST sampling rate) and up to 3400 counts in
measuring voltage. If an attempt is made to use the zero-adjust beyond
these limits, "ERR-1" appears in the display to prevent further zero-
adjust operations. Perform a zero-adjust whenever you change sampling
rates.
･ The voltage is input to the 3560 for measurement. If the voltage input is
3400 counts or more at zero adjustment, "ERR-1" appears and the zero
adjustment is invalidated even in the resistance measurement mode.
･ The value determined upon zero clearing is a reference for the possible
zero adjustment range.
･ Whenever the sampling rate is changed, a zero adjustment should be
made.
･ For 9455 PIN TYPE LEAD, first conduct the zero-adjust for 9287-10
CLIP TYPE LEAD, then replace the 9287-10 leads with 9455 PIN TYPE
LEAD and conduct a zero-adjust for the 9455 leads.
･ Zero adjustment can also be performed by the 9461 when the 9454 ZERO
ADJUSTMENT BOARD is used.
･ When the zero adjustment is made in the auto range mode, it is applied
to the entire range.
･ When the system is put in the HOLD mode while the zero adjustment is
being made in the auto range mode, "ERR-1" appears. In this case, cancel
the hold status and execute the zero adjust again.
･ When the system is in HOLD mode, the currently displayed value is zero-
adjusted.
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